This high-quality water temperature sensor corresponds to OEM numbers 3139000100, MM409383 and MC-853456, suitable for multiple diesel engines. It accurately monitors engine coolant temperature and transmits stable signals to the ECU for normal thermal control. Adopting high-sensitivity sensing core and heat-resistant outer shell, it runs steadily under high-temperature and heavy-duty working environments. Fully conforming to OEM quality standards, it is a perfect aftermarket spare part for diesel engine routine maintenance.